digiKam 5.2.0 introduce also a new red eyes tool which automatize the red-eyes effect reduction process. Faces detection is processed on whole image and a new algorithm written by a Google Summer of Code 2016 student named Omar Amin is dedicated to recognize shapes and try to found eyes with direct flash reflection on retina.
This new tool is available in Image Editor and also in Batch Queue Manager to be able to process a set of photos at the same time. The algorithm have been very optimized for speed efficiency and for small memory fingerprint. End user can adjust just a single parameter about the reducing level of retina red color to the average of blue and green channels.
In order to successfully install digiKam on Ubuntu, you have to add the PPA to your system, update the local repository index and install the digiKam package:
|$ sudo add-apt-repository ppa:philip5/extra
$ sudo apt-get update
$ sudo apt-get install digikam5
|$ sudo apt-get remove digikam5
$ sudo apt-get autoremove